I am considering this package; Ursa mini 4.6k EF with the upcoming canon 18-80mm lens because it is the only more affordable cine lens option at this time (US $5200). I shoot commercials, events, and docs, mostly handheld, and I need an ENG style camera/lens package. I considered the PL mount mini with B4 adapter and HD ENG lenses($4K and up used) but for about the same price, with the canon, I get a S35 cine lens with servo that takes advance of the full sensor and resolution of the camera rather than just HD. 4.4 stops is good enough for me. Canon has also announced they are coming out with a telephoto version of this lens. I'd appreciate any thoughts or feedback on this combination. Thanks.

John Fishback wrote:Just checked with an associate who has the UM4.6 & CNE primes and they all report to his camera.

Interesting. I wonder why mine stopped working. There isn't any kind of firmware IN the lens is there? I was using my UM4.6 today and taking note that when I change codec settings and the camera boots into the new setting that the lens would update it's fstop on screen, but it wouldn't keep up with aperture changes after that.

Comment:If you want an ultra-wide rectilinear lens (especially a lightweight one for gimbal work), this should be near the top of your list!

The maximum aperture is pretty slow (f/4.5 is the max at 10mm and f/4.8 at 11mm), however, it is very sharp at maximum aperture, good enough for 4K.

Since this is a Canon EF-S lens, it has some vignetting on the 4.6k sensor (since that sensor is larger than the Canon APS-C sensor). Thankfully, however, if you zoom in to 11mm, the vignetting is gone and is gone from the rest of the zoom range. (So, if you have a 4.6k, just pretend it is a 11-18mm f/4.8-5.6!)

Another downside is that it is focus-by-wire. However, given its short focal length and narrow aperture, you'll rarely need to pull focus. Furthermore, this lens is ideal for gimbal/drone work as the lens can be electronically-focused from LAN-C remotes connected to the Ursa. (However, if you need to use a geared system, this lens will likely prove challenging.)

At ~$300, there were bound to be compromises, but I have yet to find a better ultra wide other than the Arri UWZ (~$53,000). (The new Sigma 12-24mm f/4 Art looks promising, but it is not as wide and it will not accommodate a screw-in ND filter due to its bulbous front element.)

Piero Lancialonga wrote:Hi,after update URSA Mini EF 4k to 3.3 the Canon lens L 16-35mm 2.8 II is no longer recognized. The Canon 24-70mm L 2.8 I and the 70-200mm L 2.8 I continue to work properly. Another of my lens, the Canon 100mm macro L 2.8 IS was never recognized whit 2.8 or 3.3.I live in Rome Italy and I need to continue working with 16-35mm lens, the only alternative is to go back to the old firmware?I look forward to your responseThank youPiero

Hi Piero,

I've also had the same issue with the Canon L 16-35 2.8 II. I couldn't get it to work on firmware 3.1 to 3.4. Had to go back to 2.8.1 in order to get lens functionality again. Don't know if version 4 has fixed the issue yet but I'll be giving it a go when I can give the ursa some down time.

I've also had the same issue with the Canon L 16-35 2.8 II. Had to go back to 2.8.1 in order to get lens functionality again.

Going up to version 4 won't solve this for you. If going back from 3+ to 2.8.1 gets the lens working then your camera will need to come in to one of our support centres. We have a procedure that will get this lens working on version 3 and 4 and will also maximise compatibility with other EF lenses.

I've also had the same issue with the Canon L 16-35 2.8 II. Had to go back to 2.8.1 in order to get lens functionality again.

Going up to version 4 won't solve this for you. If going back from 3+ to 2.8.1 gets the lens working then your camera will need to come in to one of our support centres. We have a procedure that will get this lens working on version 3 and 4 and will also maximise compatibility with other EF lenses.

I still dont have my ursa mini, the budget should be good by mid december for it.

I am wondering about the Canon EF 35mm f1.2 L USM. I use it sometimes indoors for a lurking in the corner feel. I love the 84 deg frame width but it is probably not high on most people's film lists. It does look like a security camera indoors for sure. ...

After skimming through I didn't see anyone note the Sigma 30mm 1.4. Auto focus works on Ursa Mini 4k EF and I don't see any vignetting. Iris button works as well and aperture is displayed correctly. Seems to be working perfectly fine

Rented to test it this week and am pleased to say that it is working well for my needs and looks like it may be my next investment in glass for the 4.6K EF Ursa Mini. It is such a joy to have a truly parfocal EF mount lens that exhibits no visible breahting. Considering it only weighs half as much (2.5 pounds) and costs half as much as the closest competing options from Zeiss (the 21-100 starts at T2.9 but unfortunately ramps some through the range) and Angénieux (which are T2 but has one lens with 15-40 and another 30-90 so you'll need both lenses to cover same range, so 4x the cost compared to the Canon).

Rented to test it this week and am pleased to say that it is working well for my needs and looks like it may be my next investment in glass for the 4.6K EF Ursa Mini. It is such a joy to have a truly parfocal EF mount lens that exhibits no visible breahting. Considering it only weighs half as much (2.5 pounds) and costs half as much as the closest competing options from Zeiss (the 21-100 starts at T2.9 but unfortunately ramps some through the range) and Angénieux (which are T2 but has one lens with 15-40 and another 30-90 so you'll need both lenses to cover same range, so 4x the cost compared to the Canon).

adamroberts wrote:So as the URSA Min 4.6K is now shipping and many already have their hands on the URSA Mini 4K I thought it might be good to compile an updated Lens Compatibility List.

Many have asked if APS-C lenses will vignette on the 4.6K sensor. Some will (mostly Canon branded), some won't (those that are also available in Nikon mount). So I've added an extra field to test for this.

adamroberts wrote:So as the URSA Min 4.6K is now shipping and many already have their hands on the URSA Mini 4K I thought it might be good to compile an updated Lens Compatibility List.

Many have asked if APS-C lenses will vignette on the 4.6K sensor. Some will (mostly Canon branded), some won't (those that are also available in Nikon mount). So I've added an extra field to test for this.

adamroberts wrote:So as the URSA Min 4.6K is now shipping and many already have their hands on the URSA Mini 4K I thought it might be good to compile an updated Lens Compatibility List.

Many have asked if APS-C lenses will vignette on the 4.6K sensor. Some will (mostly Canon branded), some won't (those that are also available in Nikon mount). So I've added an extra field to test for this.

Tim Schumann wrote:Yes that lens has 31.4mm circle of coverage so should work fine.

It is a manual cine lens so you don't get iris, focus or zoom control.I would recommend getting the PL mount version as EF is not an ideal mount for cine lenses such as this.

Thanks Tim. I had a vendor do a test with the URSA Mini Pro and the Canon 18-80mm CN-E. He said it wasn't compatible, but I wasn't there to verify. Can you confirm if the 18-80 will work with the Mini Pro? I heard it works fine with the Mini. Perhaps he had older firmware? This will determine whether or not we order 3 URSA Mini Pros this week, thanks.

The zoom rocker for the 18-80mm T4.4 is able to be powered through the lens mount from URSA Mini EF and URSA Mini Pro currently. Information such as lens name, iris, focus and zoom position values are all able to be read and recorded by URSA Mini's lens metadata system. Electronic control of iris and focus on these lenses will be added in a future software update. Use of focus and zoom demands is possible on these lenses but additional custom cables are required from 3rd party manufacturers (Zacuto & IDX) for this.

Adam Wright wrote:Hi all. I have been told that all/most EF and EF-S lenses work with the URSA Mini 4.6K. Is that information incorrect? Thank you very much.

That is correct. Pretty much any EF or EF-S lens should work on the URSA Mini. You will find that some EF-S lenses might vignette a little as EF-S are designed to cover a 1.6x crop sensor. The URSA Mini 4.6k has an effective crop of 1.53x when compared to an Full Frame DSLR (or 135 film format).

Hi...i am a new user here. I want to know has anyone used the canon CN-E range of lenses on the UM4.6k? Mine aren't showing the Tstop in the viewfinder correctly, just a random aperture that's locked no matter what your lens is set to.

Iris, Focus and zoom control is working from the camera or ATEM switcher when using our EF mount.

The zoom rocker, Rec start/stop and AF trigger is also working on the accessory handgrip as long as the cable is plugged into the lens. That connector on the lens is in a strange spot so you’ll probably need the shoulder kit or a third party bridge/baseplate on your Mini to lift it up a bit so that the connector doesn’t foul when the camera is sitting on a bench or desk.

For use with Canon zoom and focus demands you will need the Zacuto Y cable because for some reason Canon don’t make one.